I just set up a new Macbook Pro. It's running Mojave. I specifically remember that I didn't enable Keychain iCloud syncing during setup. And even now, I checked under iCloud settings and Keychain syncing is still not enabled.
However, when I go to Keychains, I see a whole bunch of items that were created way before I got this mac. They seem to be my items from a long time ago, but how did they end up here?

However, when I go to Keychains, I see a whole bunch of items that were created way before I got this mac. They seem to be my items from a long time ago, but how did they end up here?

